If the browser in which the edX exam is running crashes, or you accidentally
close the browser window, you do not receive an alert. The exam timer continues
to run. Make sure the proctoring software is still running, and then open a new
browser window and navigate back to your edX exam. You can continue your exam,
but you will have lost time while the exam browser was closed. If your
proctoring software also crashed, contact edX Support.

If you start to close your proctoring software window, alert messages warn
you that you are ending your exam. If you continue and close the proctoring
software window, both the exam and the proctoring session end.

Answers in the exam up to the point that the session ended are submitted for
grading, but the proctoring session recording might not be completely uploaded.
In this situation, contact edX Support. The course team will decide whether
your proctored exam attempt is valid.